Improvement in thill-couplings



J. J. MANN. Thin-Coupling Patented Oct; 29, 1878;

(/WMQ WASHINGTON n C UNITED STATES PATENT OFFICE.

JOHN J. MANN, OF TAPPAN, NEW YORK.

IMPROVEM ENT IN THlLL-COUPLINGS."

Specification forming part of Letters Patent No. 209,491, dated October 29, 1878 application filed October 2, 1878.

To all whom it may concern:

. locking the thills at an elevation to be out of the way; and it consists in a novel construction and arrangement of the parts to that end, as will be hereinafter particularly described.

In the accompanying drawings, Figure l is a plan view of my improved thill-coupling; and Fig. 2 is a vertical central section, showing the locking of the thill-head when the thills are elevated.

a represents the axle; b, the clip, which is bolted to the axle in any well-known manner. The clip b is provided with side extensionpieces 0 c, which serve as bearings for the bolt upon which the thill-head works. and also as lateral bearings for the independent springplate, as hereinafter described.

d is the thill-iron, which terminates in a camshaped head, 0, which is hung between the side flanges of the clip working upon the bolt fi-which has its hearings in the side flanges c c, and is held in position by nuts 9 g.

h is a curved spring-plate, which is bolted to the clip at i, and has side lateral projections jj, which, when the spring-plate is in its normal condition, rest in corresponding slots is it formed in the side flanges c c of the clip.

The spring-plate h is provided with a beveled flange, m, which, when the cam-head comes in contact with it, forms a perfect looking mechanism for the thills.

l is a block of rubber or other elastic material interposed between the cam-head e and the base of the spring-plate h.

One side of the rubber is provided with a square recess to enable it to fit snugly over the bolt-head 'i, which serves to hold it in position, forming a yielding bearing for the camhead, and serving as a complete protection against the accumulation of dust about the working parts.

In coupling, the thill is raised and the camhead is brought into contact with the beveled flange m of the spring-plate h, as seen in Fig.

2, which operates as a latch to hold the thills prevents vibration and rattling, and forms a protection against the entrance of dirt and dust, thus rendering the coupling more secure and durable.

What I claim as new, and desire to secure by Letters Patent, is-

1. The combination, with the clip I), having side flanges cc, and the thill-iron d, having a cam-shaped head, 6, pivoted upon a transverse bolt, j, which has its ends arranged in the side flanges oft-he clip, of the curved spring-plate h, bolted to the clip between the side flanges, and having the beveled flange m, all substantially as and for the purpose described.

2. The combination, with the clip b, having side flanges 0, provided with slots h, and the thill-iron d, constructed with the cam-shaped head 6, pivoted upon the transverse bolt f, which has its ends arranged in the side flanges of the clip, of the curved spring-plate h, bolted to the front face of the clip, and having lateral projections t and beveled flange m, all sub stantially as a id for the purpose described.

3. The curved spring-plate h, attached to the clip b by the headed bolt 2', in combination with the thill-iron d, having the cam-head e, pivoted on the transverse bolt f, and the elastic pad I, having a recess fitting the head of the bolt 5, all substantially as and for the purpose described.

JOHN J. MANN. Witnesses:

A. D. PACKARD, JAMES H. HUNTER. 

